Rotary fluid-pump.



A.- P. BRUSH.

ROTARY FLUID PUMP.

APPLICATION men NOV. 10, 1913.

Patented Dec. 7, 1915.

2 $HEETS-8HEET 1- A. P. BRUSH.

ROTARY FLUID PUMP.

APPLICATION FILED Nov 10. 1913.

Patented Dec. 7, 1915.

2 SHEETS-SHEET 2- WWlTFM %TATF% PATENT llFFlFE ALANSON P. BRUSH, OF DETROIT, MICHIGAN.

ROTARY FLUID-PUMP.

Application filed November 1( 1913.

To all whom it may concern:

Be it known that I, ALANsoN P. BRUsH, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in R0- tary Fluid-Pumps, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to rotary pumps, and is more particularly designed for use in pumping liquidssuch, for instance, as water in a cooling system for explosion engines, or oil in lubricating systems.

It is the object of the invention, first, to obtain a construction which is inexpensive to manufacture and is efficient in operation; second, to form the casing in duplicate complementary sections between which the rotor is arranged and which form bearings for the drive shaft thereof.

With these and other minor objects in view, the invention comprises certain features of construction as hereinafter set forth.

In the drawings: Figure 1 is a perspective view of one of the casing sections and rotor detached; Fig. 2 is an edge elevation of the pump partly in section; Fig. 3 is a side elevation thereof; Fig. i is a sectional vlew, illustrating a detail of construction. Fig. 5 is a crosssection on the line 00-00 of Fig. 4:.

A and B are two duplicate casing sections, which may be arranged complementary to each other to form a chamber receiving the rotor C, and central bearings D for the rotor shaft E. Each casing comprises a spiral or helical passage F surrounding a central hub portion G, one end of said passage term1nating in a nipple H, while partitlon wall at the other end tapers to a knife edgeI, preferably after one complete convolution. The rotor C is in the form of a disk arranged between the hub portions F of the casing, having a peripheral portion J engaging an annular recess or rabbet K in the casing sec-v tions, while opposite the spiral or helical passages the disk is cut away'to form a series of spaced blades L. These blades are 7 preferably atan angle transverse to the angle of the spiral'passages, and serve to impart a rotary movement to the water in said passages, and also to cause a flow from one passage to the other. 2, it will be observed :that the splral passage on one side of the rotor is constantly diminishing in width or cross section, while that Specification of Letters Patent.

As shown in Fig.

Serial No. 800,128.

upon the opposite side is correspondingly enlarging. Thus if rotary movement is imparted to the water in these passages, movement in one direction will cause the flow of water through the spaces in the rotor from the contracting passage to the enlarging one, whlle rotation in the reverse direction will produce precisely the opposite effect. Furthermore, the blades of the rotor are so angled as to assist in causing the flow of liquid through the intervening spaces and to impart the required rotary movement to the water in the spiral passages. Consequently the liquid may be propelled through the casing with equal facility in opposite directions by merely reversing the direction of movement of the rotor.

The construction is a simple one to manufacture, and both the casing sections and the rotor may be formed by die castings, thereby dispensing with all machine Work, While the assembly of the parts requires merely the placing of the sections upon opposite sides of the rotor and clamping them together.

As shown and preferably constructed, the spiral or helical passage in each casing section forms one complete convolution and then extends to the inlet or'outlet nipple. The casing sections are also arranged in such relation to each other that the knife edges I are substantially opposite each other, while the inlet and outlet nipples extend in opposite directions. Such an arrangement I havefound to produce a much greater efficiency than where turned in any other position.

What I claim as my invention is:

1. The combination with a bladed rotor,

Patented Dec. V, 1915.

of a casing section arranged at one side of said rotor and provided with a spiral passage forming one complete'convolution, one

end of said passage connecting with an external orifice and the opposite end tapering.

tially opposite each other on opposite sides a the complementary sections being substanof said rotor. tially opposite each other.- I

3. The combination with a bladed rotor of In testimony whereof I afiix my signature a casing formgd inf conziplementary sections in presence of two Witnesses. on opposite si es 0 sai rotor, each section provided With a spiral passage forming one 7 ALANSON BRUSH complete convolution With a tangential out- Witnesses: let separated from the adjacent convolution WM. J BELKNAP, by a partition, the ends of said partitions in JAMES P. BARRY. 

